Valve.



3. WHITAKER. VALVE.

APPLICATION FILED 'JAN. 11, 1904.

'Wi tnesses PATENTED MAY 21, 1907.

Attozxieys.

UNITED. STATES PATENT OFFICE.

RICHARD Wil'iiAKER, OF NEW 'BRUNSWlCiQJEWV JERSEY/ASSIGNOR, BY DlltECiAND MESNE ASSIGNMENTS, T BRUNSWICK REFBIGERATING COMPANY, A CORPORATIONOF NEW'JERSEY.

VALVE.

Specification of Letters Patent.

Application filed January 11, E104. Serial No. 188,614.

Patented May 21, 1907.

,To all whom it Ina/y concern:

Be it known that I, RICHARD WHITAKER,

a citizen of the United States, residin in the city of New Brunswick,county of Mi .dlesex, and State of New Jersey, have invented a certainnew and useful Improvement.

Valves, of which the following is a descl'ipthe cost of manufacture, andto reduce the number of parts of the'valve, I

Another object is to make a valve which may be readily taken apart andthe internal parts rendere accessible.

Another object is to rovide means for per- I mitting the removal 0 thegland cover Without impairing the adjustment of the stem.

Another object is to prevent the choking of the valve when used as anexpansion valve for ammonia refrigerating machines, by deposits withinthe pipes Another object of the invention is to provide means forsecuring the pipe carrying members together, and to the valve.

The invention comprises a body with a longitudinal extended cylindricalopening, for the reception of the valve stem, the lower end of theopening forming the valve seat. The valve stem is provided with a faceand a screw-threaded portion, which latter engages with a cover.Surrounding the stem is a gland and packing rin of the ordinary kind.The cover is provide with an annular depending portion,'having screwthreads which en age with the threads formed upon. the va ve bpdy. Thethreads upon the valve body and upon the valve stem are of the samepitch, and therefore both sets of threads on the cover are the samepitch, so that it may be removed or replaced without varying theadjustment of the valve stem, or changing the relation of the valve faceto the seat. The central opening communicates with. the outside of thebody'by means of a short pas racterized oint adjacent to the medial lineof the body. this latter passage communicates with the central openingand valve seat by a short passage, which is preferably smaller than thesages or ports are preferably diagonally arranged, so that their outerextremities will be upon the same lateral plane. The lateral passagewhich serves to admit gas to the valve-when the valve is designed andused as an expansion valve, is provided with an enlarged chamber, withinwhich 1s removably secured a screen, which will absorb all etc., elorethey reach the valve.

The members which carry the pipes are each in the form of a tie plate,and each has nular seat formed upon opposite faces 01 the valve body,and surrounding the lateral passages or ports. A gasket may be arrangedwithin each of the annular seats, and the pipe members are securedtogether and in engagement with the valve seat by tie bolts, reierablytwo in number, one'on each side of the valve body.

In order to better understand the nature of the invention, attention isdirected to the -accompanying drawing, showing one embodiment thereof,as applied to an expansion valve.

Figure 1 is a central longitudinal section of Fig. 2,' and Fig. 2 is ahorizontalsection taken on the line 2-2 of Fig. 1.

In all of the several views like parts are designated by the samenumerals of reference. e

The body 1 is of the general shape shown, that is to se its 1'1 perportion is of round section, w 'e the lbwer halfis somewhat flattened,forming plane op singfaces 2, 2. Within' the body 1 ieajc ind'ricalcentral opening 3 of comparative y large size, and an enlargement 4 ofsaid opening, of mu ch larger size. The lower end of the opening 3 formsthe valve seat 5, and is turned off square and true ior this purpose.

Within the opening 3 isthe valve stem 6,

| which is cylint rical and makes a close fit forei n matters from thetubes, compressors,

:central' opemng, so that the valve seat will a i not be destroyed. Bothof the lateral pasan'annular flange which engages with an an 1 sage orport, While upon the opposite face of l with the opening and is guidedand supv the body, but beyond the valve seat, is are other passage orport which extends to a l is contracted at'7, and its lower exp-emity is1 ported thereby. The lowerend of the stem finished true, so as to formthe valve face 8. The contracted portion 7 of the stem is for thepurpose of permitting the gas, which. passes by the valve face, to enterthe 'discharge passage, which will be described. i

The upper portion of the valve stem is preferably, though notnecessarily, reduced in size and is provided with screw threads 9. Atthe upper end of the stem is a wheel (not shown) of the ordinary type orother device, by means of which the stem may be rotated. Surrounding thestem, and within the opening 4, are packing rings IQ and a gasket 11 ofthe ordinarytype, which'are forced down.- ward in lace by means of thegland 12. This glen. is secured in position by means of a cover 13. Thecover is provided with screw'threads 14, which engage with the threads 9on the stem 6, and with a depend- :ing annular portion 15 havinginternal threads 16, which en age with threads 17 formed upon the outsie of thebody 1. The

threads 16 and 17 serve to secure the cover in place u )on the body, andto place the packmg un er pressure, and l denominate these as securingthreads, the threads 9 and 1 1 serve as a means of adjustment for thevalve stem, and 4 these I call the adjusting threads. The valve stempreferably en gages with considerable resistance with the packing andthe interior of the opening 3, so that when the adjusting means isremoved it will remain in' position.

The adjustin threads 2 and-14, and the securing thre'ar s 16 and 17 areall of the same pitch, so that. the valve stem being once adjusted inposition, the cover ma beremoved, or the pressure upon the pac ingadjusted without varying the relative position of the valve face and thevalve seat. This is important 1n ice-making machines,

especially of the automatic variety, in which the valve stem is moved bymachinery, which cannot be readily disconnected.

The valve seat may be readily ground byremoving the cap 13, the stembeing steadied" by means of the packing rings 10, gasket 11,

and. the o ening 3, the valve stem being rotated in t e usual manner.

The central opening 3 connects with one face 2 of the valve body bymeans of a lateral passage or port 18. A second lateral passage orport'19 extends from the o osite face of the valve body to a pointaqacent to the medial line of the same, and this passage communicateswith the valve seat by means of a short opening or chamber 20, which ispreferably smaller than the central 0 )ening';

3. The, passages 18 and 19 are re -erably diagonally arranged as shownin ig. 1, so that their outside extremities will be nearly or exactlyupon the same lateral plane.

lhe passage 19, whichit is to be understoodis the entrance'passage forthe gas, is

provided with a' chamber 21, having an'enlargement 2-2; the connectingpoint of the two formin a shoulder shoulder an within the enlargement 22is a screen 24, of sufliciently fine mesh to intercept all foreignmatterswhich may pass from the pipes, compressor, etc, into the chamber21. v i "l I regard the location of this screen at this Upon this pointto be a great improvement over that which has been donebefore, as inammonia refrigerating apparatus it is found almost impossible toentirely clean the pipes, compressor and tanks, and keep them in acondition entirely free from foreign matter. With the screen located inthis position it is only the foreign matter which might be withinthechamber 21, and passages 19 and 20,

that will pass into the valve, and these portions of the valve may bereadily cleaned and ke t so.

he pipes 25 and 26 to which the valve is attached are screw-threaded, orotherwise secured to the tie plates 27, which are secured to the flatfaces 2, 2, of the valve body. These tie plates are secured together andto the valve body by any suitable means, but preferably by the tie bolts28, one assing on each side of the valve body. ese bolts are providedwith adjusting nuts 29, by.

means of which they may be forced against the valve body with adjustableressure.

In order to make a tight 'oint etween the plates 27 and the'valve bo y,the former are provided with" an annular flange 30, which engages withinan annular seat 31 formed upon each of the faces 2, 2, of the valvebody. A gasket 32 within each of the annular seats forms a tight joint,it being understood that the tie bolts 28 are used to force the tieplates 27 toward each other with a suflicient amount of pressure toenable this to be done.

By constructing the valve as s been described and illustrated it ispossi Is to make it out of solid stock, by using a piece of steelorother metal, shaping it to the outline of the valve body, and drillingthe necessary holes to make the passages and the valve seat. The; bodybeing clamped between the two plates 27 tight 'oints being secured bymeans of the annular anges and seats, and the/body supported inposition, the need of integral flangesis not necessary, and the bodytherefore does not have who made of cast metal or" a drop forging. .Thisis a very important feature in an ammonia yalve as cast etal isunsuitable and undesirable, for this purpose, owing to the presence ofair holes and faults,

while drop forgings are themselves costl and require. expensive.finishing. The va ve is also made very s1mple, and the passages arerendered more accessible than s the case with a cast metalstriicturepvith integral vention, and it is to be understood that it isters Patent, is

body herein the cover is provided threads engaging with the, and adusting threads engaging with the stem, both threads bein of the samepitch, whereby the cover can e removed or replaced without changing theposition ofthe stern. i

2. The combinationwith a body, having a cylindrical chamber andia valveseat therein, of a stem having a cylindrical portion and a face, and acover, the said cover having securing threads engaging with the body andadjusting threads engaging with the stem, the said threads being of thesame pitch.

3. The combination with a body, having a valve seat and a threadedportion, of a stern within the body and ada ted to be rotated and movedlongitudinal y therein to and away from the seat, the said stem having athreaded portion, and a cover surrounding the stem and engagin with thethreads thereon and with the threads on the body,

1, A valve, with securing the threads on the stem and body .being of thesame itch.

4. he combination with abody, having a valve seat and a threadedportion, of a stem within the body and adapted to be rotated and movedlongitudinally therein to and away from the seat, the said stem having alln'oallwl'portion, a gland within the body and sm-roumling the stem,and a cover surrounding the stem and engaging with the 1 threads thereonand with the threads on the stern and body being of the same itch.

valve seat and an external threadedportion,

rotated and moved longitudinaly therein to and away from the seat, thesaid stern having .a threaded portion and a cover surrounding the sameand engaging with the threads thereon and having an annular dependingportion engaging with the threads on g the bod the threads on the stemand body being 0 the same pitch.

6.' A- valve having a body made of a solid block with a passage dril edtherethrough and having a'valve seat and a movable valve therein, thesides of the block through which the passage extends having planeopposing faces, concentric seats around the passage, pipes havingtie-plates which engage with the seats, and tie-bolts for compressingthe plates against the seats and securing the pipes to the body of thevalve. v

7. A valve having a body formed of a block having a valve therein, apassage therethrough, the said passage having a shoulder therein and -apipe with a tie-plate, the said tie-plate being compressed against thebody, and a screen in the passage and on the shoulder so that n )on t eplate being removed the screen will be exposed.

Janu arv 1904.

Witnesses lnzoxnno ll. DYER, Jamil-101M 'lm'mn.

body and with the gland, the threads on the This specification signedand witnessed.

5; The combination with a be y, having a of a stem within the body andada ted to be e

